Clock Buffers

Clock buffers are semiconductor devices that fan out clock signals and isolates the source from the load. Clock buffers are known to have multiple controllable outputs as well as separate power supplies for outputs or for input/output allowing it to work as a level shifter.

What are clock buffers?

Clock buffers are devices clock buffers create multiple copies of input clocks for individual distribution across a PCB. They are comprised of single-ended output buffers and differential outputs. Single-ended output clock buffers are LVCMOS (Low voltage complementary metal-oxide-semiconductor) while differential output buffers may be LVPECL (Low Voltage Positive Emitter Coupled Logic), HSTL (High-speed transceiver logic) or LVDS (Low Voltage Differential Signaling).

Clock buffers don't alter the frequency properties of the input signal, which in turn minimalises the additive noise which is added to the input whilst in the buffering stage.

Types of clock buffers

Clock buffers are offered in an array of variations such as variations on the maximum operating input frequency that can range from 30 Mhz to 8 Ghz, variety on the maximum supply current it can support and the number of pins installed in the IC.

Some clock buffers feature ultra-low jitter and low skew clock distribution.

Applications of clock buffers

Clock buffers are widely used in applications such as;

  • High-speed instrumentation and line receivers
  • Converter clocking
  • Automated test equipment (ATE)
  • Wireless and wired communications
  • Medical and industrial imaging

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Description Price Number of Elements per Chip Maximum Supply Current Maximum Input Frequency Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature Maximum Output Frequency Minimum Operating Supply Voltage
RS Stock No. 121-6383
Mfr. Part No.MC100EL11DG
TWD157.00
Each (In a Tube of 98)
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4 31 mA 1.5GHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +5.7 V +85 °C - -4.2 V
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Mfr. Part No.MC100LVEL11DG
TWD157.00
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4 30 mA 1GHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +3.8 V +85 °C - ±3 V
New
RS Stock No. 217-7834
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TWD100.80
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TWD81.20
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1 20 mA 50MHz Surface Mount SOIC 8 - - - - - - - -
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Mfr. Part No.CY22393FXI
TWD486.70
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3 100 (Typ.) mA 166MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.46 V +85 °C 166MHz 3.13 V
RS Stock No. 168-9987
Mfr. Part No.SI53159-A01AGM
TWD114.70
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9 60 mA 210MHz Surface Mount QFN 48 6 x 6 x 0.75mm 5mm 6mm 0.75mm 3.465 V +85 °C - 3.135 V
RS Stock No. 807-1713
Mfr. Part No.ADCLK944BCPZ-WP
TWD280.00
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4 165 mA - Surface Mount LFCSP 16 3.1 x 3.1 x 0.75mm 3.1mm 3.1mm 0.75mm 3.63 V +85 °C - 2.375 V
RS Stock No. 193-8449
Mfr. Part No.CY2305SXI-1
TWD79.30
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8 35 mA 133MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +85 °C 133MHz 3 V
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Mfr. Part No.SI53108-A01AGM
TWD89.50
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- 90 mA 150MHz Surface Mount QFN 48 6 x 6 x 0.9mm 6mm 6mm 0.9mm 3.465 V +85 °C 133MHz 3.135 V
RS Stock No. 194-9021
Mfr. Part No.CY2309NZSXC-1H
TWD420.90
Each (In a Tube of 48)
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1 32 mA 133MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +70 °C 133.3MHz 3 V
RS Stock No. 194-9030
Mfr. Part No.CY2309SXI-1
TWD665.00
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1 35 mA 133MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +85 °C 133.3MHz 3 V
RS Stock No. 194-9009
Mfr. Part No.CY2305CSXI-1H
TWD219.10
Each (In a Tube of 97)
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1 35 mA 133MHz Surface Mount SOIC 8 4.97 x 3.98 x 1.47mm 4.97mm 3.98mm 1.47mm 3.6 V +85 °C 133.33MHz 3 V
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Mfr. Part No.NB3N2304NZDTG
TWD54.60
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4 25 mA 140MHz Surface Mount TSSOP 8 3.1 x 4.5 x 0.95mm 3.1mm 4.5mm 0.95mm 3.6 V +85 °C 140MHz 3 V
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Mfr. Part No.9DBL0252BKILFT
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- 25 mA 175MHz - VFQFPN-24 24 - - - - - - - -
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Mfr. Part No.NB2305AI1DR2G
TWD47.20
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1 50 mA 133MHz Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 3.6 V +85 °C 133.3MHz 3 V
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BrandMicrochip
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1 70 mA 133.3MHz Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.1mm 4.5mm 0.95mm 3.6 V +85 °C 133.3MHz 3 V
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Mfr. Part No.ADCLK925BCPZ-WP
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3 97 mA - Surface Mount LFCSP VQ 16 3 x 3 x 0.9mm 3mm 3mm 0.9mm 3.63 V +125 °C 7.5GHz 2.375 V
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- 32 mA 133MHz - SOIC-8 8 - - - - - - - -